Vehicle spring



July 12 1927. 1,635,360

D. E. DUNCAN VEHICLE SPRING Original Filed May 20, 1924 Patented J ly 12, 1927.

UNITED STATES VEHICLE Application filed May 20, 1924, Serial My present invention relates to improvements in springs of the semi-elliptic type and is designed more especially for use in motor vehicles, though notlimited to such.

I The invention aims to provide a construction which will act as a shock absorber on the downward movement of the load, reduce rebound, and, when embodied in the rear springs of an automobile having the Hotch- 1o kiss drive, will prevent back lash.

l/Vith these objects in view, the invention includes the novel construction hereinafter described and particularly defined by the appended claims, the said invention being illus trated by the accompanying drawing, in v 3 to seml-elliptic'springs, I mean to include 7 which V The figure shows a side elevation of a spring constructed in accordance therewith. Referring by reference characters to t his drawing, the spring is shown as comprising a plurality of leaves of gradually increasing length, which may be of any desired numberand size according to the circumstances under which they are to be used, and which,

except as hereinafter specified, may be of the ordinary or any desired construction.

The topmost leaf 1 is provided wlth eyes 1* and 1 at opposite ends to receive the customary shackle bolts (not shown) which eyes are shown conveniently as beingformed by handing or curving the spring ends mto approximately cylindrical form. Underly: ing the spring leaf 1 is a second spring leaf 2, which has one end coiled or bent as at 2 to surround the eye 1 at the corresponding end of spring leaf, while its other end is bent upwardly as'at 2 to partially surround the correspondingeye 1 DUNCAN, 0F FAR ROCKAWAY, MICHAEL J. MODONNELL, OF FAR ROGKAWAY, NEW YORK.

PATENT J OFFICE.

NEW YORK, nssrenon 0F OI T E-HALF r0 SPRING. I

No. 714,634. Renewed June 2,1927.

vPreferably the end 2 is extended about half way up on the eye portion l and'its 40 end is preferably tapered as shown. 1

The lower spring leaves, 3. 4:, 5, and 6, are of the ordinary construction and four are shownmerely as an example of any desired number, and an upper short leaf 7 may be used if desired.

It will be readily apparent that my spring leaf 2 may be manufactured as an individual I element for incorporation in existing semi elliptic springs by making it of the proper dimensions, or it can be incorporated'in a complete spring by the manufacturer.

It will be'understood that where I refer also the type of springs used'in what "is known as the platform spring. 7

Having thus describedmy invention, what I claim is: i

1. A vehicle springof the semi-elliptic type, comprising a leaf having shackle bolt eyes in its'ends, an underlying leaf having I one end bent toencircle the shackle bolt eye, the other end bent to partially encircle the other shackle bolt eye, and an overlying leaf terminating short of" each shackle bolt e e. r r

2. A vehicle spring of the semi-elliptic type, comprising a leaf having shackle bolt eyes in its ends, an underlying leaf having one end bent to encircle-the shackle bolt eye, the other end bent to partially encircle the other shackle bolt eye and being beveled, and an overlying leaf terminating short of each shackle bolt eye.

In testimony whereof I affix my signature. DANIEL E. DUNCAN. 

